Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Liquid crystal-based broadband electric field-adjusted negative refractive index device and manufacturing method thereof

A technology with adjustable negative and refractive index, applied in instruments, polarizing elements, optics, etc., can solve the problem of inability to meet the application requirements of negative refractive index materials, and achieve the effect of improving the working frequency

Inactive Publication Date: 2011-05-11
NORTHWESTERN POLYTECHNICAL UNIV
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, theoretical studies have shown that when the dielectric properties of liquid crystals change, the operating frequency amplitude modulation (frequency shift amplitude / center operating frequency) of negative refractive index materials is only 3%, which obviously cannot meet the application requirements of negative refractive index materials.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Liquid crystal-based broadband electric field-adjusted negative refractive index device and manufacturing method thereof
  • Liquid crystal-based broadband electric field-adjusted negative refractive index device and manufacturing method thereof
  • Liquid crystal-based broadband electric field-adjusted negative refractive index device and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment 1: Utilize circuit board printing technology to etch the metal sheet 5 array and lead wire 6 of fishnet structure on one side of the copper clad laminate 1 with a thickness of 1.00mm, the size of the metal sheet 5 is: W=8.00mm, L=12.00mm , Px=15.00mm, Py=10.00mm. Positioning holes 4 with a diameter of 1.00 mm are machined at the four corners of the copper clad laminate 1 . An epoxy glass plate with a thickness of 0.50 mm and the same size as the copper clad laminate 1 is selected, and a U-shaped bead 2 with a side width of 5.00 mm and a positioning hole 4 is prepared by using a numerical control machine tool. Coat the polyimide liquid crystal aligning agent arranged along the surface on the side of the copper-clad laminate 1 with the metal sheet array by the spin coating method, heat-cure the film by step heating method, and use a dust-free cloth on the polyimide film along the Orientation rubbing in the direction of the electrodes to obtain a polyimide liqu...

Embodiment 2

[0045] Example 2: A metal sheet 5 array and lead wires 6 with a fishnet structure are prepared on a copper clad laminate 1 with a thickness of 1.00mm by circuit board printing technology. The size of the metal sheet is: W=6.00mm, L=10.00mm, Px=15.00 mm, Py=8.00mm. At the same time, positioning holes 4 with a diameter of 1.00 mm are machined at the four corners of the copper clad laminate 1 . Select an epoxy glass plate with a thickness of 0.40 mm and the same size as the copper-clad laminate 1, and use a CNC machine tool to prepare a U-shaped bead 2 with a side width of 5.00 mm, and machine the four corners of the U-shaped bead 2 into a positioning plate with a diameter of 1.00 mm. hole. Coat the polyimide liquid crystal aligning agent arranged along the surface on the side of the copper-clad laminate 1 with the metal sheet array by the spin coating method, heat-cure the film by step heating method, and use a dust-free cloth on the polyimide film along the Orientation rubbin...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
refractive indexaaaaaaaaaa
Login to View More

Abstract

The invention discloses a liquid crystal-based broadband electric field-adjusted negative refractive index device and a method for manufacturing the same, which are used for solving the technical problem that the conventional negative refractive index device has narrow operating frequency. In the technical scheme, in a liquid crystal injection cavity formed by copper-clad plates and U-shaped pressing strips, the liquid crystal serves as a substrate of the negative refractive index device, so that the working frequency of the negative refractive index device is changed to the greatest degree. Due to the characteristic that the liquid crystal dielectric property is easily controlled by an external field, by applying an electric field to change the equivalent dielectric constant of the liquid crystal, the working frequency of the negative refractive index device is dynamically adjusted, and the highest adjusting amplitude is 10.4 percent.

Description

technical field [0001] The invention relates to a negative refraction index device, in particular to a liquid crystal-based broadband electric field adjustable negative refraction index device, and also relates to a manufacturing method of the electric field adjustable negative refraction index device. Background technique [0002] Negative refractive index materials exhibit a negative refraction effect that existing materials in nature do not have, and can be applied to the design and preparation of new electronic information components. However, ordinary negative refractive index materials can only work effectively in a certain frequency band, which greatly limits the application of negative refractive index materials. [0003] refer to Figure 9 , the document "Tunable fishnet metamaterials infiltrated by liquid crystals," Applied Physics Letters, 2010, vol.96, p.193103-1-193103-3," discloses a negative refractive index material based on a liquid crystal metal fishnet str...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/13G02B5/30
Inventor 张富利张卫红王旭辰
Owner NORTHWESTERN POLYTECHNICAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com